Foldable cardboard box



NOV. 24, 1931. STROEHMANN 1,833,599

FOLDABLE CARDBOARDBOX Filed July 9, 1930 2 Sheets-Sheet l By 24mm Allorncy NOV. 24, 1931. STROEHMANN 1,833,599

FOLDABLE CARDBOARD BOX Filed July 9, 1930 2 Sheets-Sheet 2 H. 'czSiroehmann A Home y 6 Inventor Patented Nov. ,24,

HAROLD J. STROEHMANN, or wrnnmmsronrfrmmsrnvmn v FOLDABLE cARnnom'Box I i Application filed July 9, 1930. Serial No. 466,838.

This invention relates to improvements embodied in the construction of a folding vblank such as is usable in Constructing a card- 7 board carton, box, or the like, and the refineoment is embodied in either the body of the box, or the cover, or both. i

Briefly stated, the novelty is predicated upon the provision ofcompanion registering curvate notches disposed at the corners of the I box in such a manner as to facilitate application and removal of a snugfitting cover.

, .It is amatter of common knowledge that with the present straight right-angledcorners. difliculty is frequently experienced with matching the cover withthe body and ex- Figure 4' is a plan view of the foldable' cardboard blank from which the box is designed.

Attention is invited to Figure 4,.wherein the principal novelty is better illustrated. The single cardboard blank is marked off by score lines for example, the longitudinal spacedparallelfold or score lines 5, and 6, and the transverse fold lines 7 and 8 respectively. This arrangement defines a bottom area 9, a pair of side walls 10, a pair of endwalls 11, as wellias two pairs of corner flaps, theflaps of each pair being distinguished by the 'numerals 12and 13 respectively. 7 The flaps 13 have tongues for interlocking I connection with the companion diagonal slots 14 in the flaps 12; When the blank is folded "up to provide the box, the walls 10 are in spaced parallelism and the end walls 11 are disposed inwardly against the interconnected flaps 12 and 13.

At the juncture of the 'fold'lines 7 and and between the flaps 12 and the adjacent side walls13 arecurvate notches 15. On the opposite sides and at corresponding points are similar notches 16. At the opposite ends of the upper edges of the end wall 11 are halfnotches 15a, and 16a respectively. Otherwise stated, the notches 15 and 16 are substantially semi-circular in configuration and the notches 15a and 16a are segmental.

Thus, when the end walls 7 are folded inwardly on the lines 7 and 8 to upstanding position, they lie in contact with the interconnected tongue and slot flaps 12 and 18. This brings the half portion of the notches 15 and 16 into registry with the segmental notches 15a and 1611 respectively.

At the same time, it provides segmental notches at the opposite ends of the walls 10. Hence, the co-acting corner portions of the sides'and ends of the folded box define cutaway clearance corners such as facilitate application and removal of the cover (not 76 shown).

As before stated, the construction could be reversed and arranged in the cover if desired, or it may be embodied in both the cover and the box.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear, understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size, and rearrangement of details coming within the field of invention claimed may be resorted to in actual practice if desired.

I claim:

As a new product of manufacture, a cardboard blank for producing a folded box comprising a single piece of sheet material patterned. to provide a bottom and provided with a pair of longitudinally extending fold lines defining side walls and a pair of transversely extending fold lines defining end walls, and each end wall being cut adjacent each end'thereof to form a pair of corner flaps, the .corner flaps being provided with tongue and slot joints for interlocking connection, the opposite longitudinal edges of the blank being formed with substantially 1e;

V f V 1,833,599

semi-circular curvate notches intersecting the fold lines distinguishing the end walls from V the side walls, the upper edge portion of each of said end walls being formed with segmen- 5 'tal notches for registry with the adjacent portions of the aforesaid notches, whereby when the blank is completely folded to provide a box, the respective pairs of notches"co-operate in producing substantially ;V-sha ped clearance spaces at the respectiveco 'nei'spf v theboXL In testimony whereof I aifix m signature. I

IHAROLD J. STROEHMANN; l 

